| 摘要 |
PURPOSE:To obtain fine boron carbide particles by previously mixing boron carbide powder with starting materials and heating the mixture when boron carbide is further newly produced with a boron source and a carbon source as the starting materials. CONSTITUTION:When boron carbide is produced with a boron source such as metallic boron and a carbon source such as carbon black as starting materials, boron carbide powder of <=10mum particle diameter is previously mixed with the starting materials by 5-60 pts.wt. per 100 pts.wt. boron carbide newly formed by a reaction, and the mixture is fired at 1,500-2,000 deg.C in an inert gaseous atmosphere optionally after pelletizing to obtain fine boron carbide powder of about 1.5-2.5mum primary particle diameter. |
